I am talking about the BMW valvetronic system. It's variable valve lift as opposed to variable valve timing. They vary the valve lift to influence engine airflow and engine RPM as opposed to doing that with a butterfly valve in the throttle body.

Crazy stuff.

The "setting" I did changes the minimum lift to .8mm vs .3mm.

I think the theory is after things wear a bit and cold temps will mess up the cylinder "filling potential" as the valves might not be lifting enough initially to ensure good airflow and smooth running at idle.


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Garrett Fell
2014 Honda Pilot - The *new* wife mobile
2005 BMW X5 - 4.4i - It's mine now!
2003 Honda CRV - My train car
1959 VW Beetle - My toy (13.18 @ 100.86 in the 1/4)